Crowdy may refer to:
People Edith Frances Crowdy CBE (1880–1947) was the deputy director of the Women's Royal Naval Service. Joseph Crowdy CB (1923–2009) was an English soldier and military doctor. Rachel Crowdy DBE (1884–1964) was an English nurse and social reformer. William Saunders Crowdy (1847–1908) was an American soldier, preacher and entrepreneur.
Places Crowdy Bay National Park is a national park in New South Wales, Australia. Crowdy Reservoir is a reservoir in Cornwall, United Kingdom.